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What is the viewing distance?
It is the actual distance of the TV from the viewer. If the distance is too far or too close, it will have a bad influence. For example, if you look at the distance too close, it may cause visual fatigue, and the screen will have a slight graininess and become less realistic. If you look at the distance too far, the details in the picture will be lost. When you watch TV, some subtitles and other small fonts will appear unclear and other undesirable conditions, thus affecting the viewing.
So how does the viewing distance count?
This depends on the size of your living room. Here is a simple calculation formula: TV's best viewing distance = TV screen diagonal x 0.0635. For example, for a 55-inch TV, the calculated result is 55x0.0635=3.4925 meters and 3.5 meters. Then for a 55-inch TV user, the distance of 3.5 meters is the best viewing distance.
Of course, we can also calculate the size of the TV that is suitable for the size of the TV. For example, if the viewing distance is 3 meters, then use 3 ÷ 0.0635 = 47.244 ≈ 47 inches, then you can buy 47-inch TV is most suitable. Of course, everyone does not need to be too strict in terms of size. For example, if the distance is about 2.6 meters, then 40-inch or 42-inch TVs can be selected.
Attach the TV's best viewing distance table, and everyone can choose the TV size based on this table. 
What is the best type of smart TV with a large screen? Xiao Bian pointed out that it is necessary to choose according to the size of the living room in his home and the viewing distance. At present, the mainstream size of smart TV products in the market is between 42 inches and 55 inches. Many users always pursue the big screen blindly while they are in the buying process. They think that the bigger the screen, the better. This seemingly reasonable idea is actually not correct. Below, look at how big the screen size of smart TV is!
Smart TV screen size purchase standard
Smart TV screen size purchase standard